Bag filling machine



% April 1939- A. KRASA 7 2,155,196

'BAG FILLING MACHINE Filed Aug. 9, 1952 10 Sheets-Sheet -1 INVENTOR Aril 18, 1939. A. KRASA 2,155,196

' BAG FILLING MACHINE I Filed Aug. 9, 1932 10 Sheets-Sheet 2 and: Q 4260 25a i F 267 Fall?! INYENTOR April 18, 1939. KRASA 2,155,196

BAGYFILLING MACHINE Filed Aug. 9, 1932 10 Sheets-Sheet 3 22/ INVENTORApril 18, 1939. A. KRASA BAG FILLING MACHINE Filed Aug. 9, 1932 10Sheets-Sheet 4 INVENTOR' April 18, 1939. A. KRASA BAG FILLING MACHINEFiled Aug. 9, 1932 10 Sheets-Sheet 5 R O T N E V m Aprills, 1939. A.KRASA BAG FILLING MACHINE Filed Aug. 9, 193 2 10 Sheets-Sheet 6 INVENTORFiled Aug. 9, 19-32 10 Sheets-Sheet! INVENTOR April 18, 1939. A. KRASABAG FILLING mcum:

Filed Aug. 9, 19:52 10 Sheets-Sheet s w I m 4 Q1: 7 h U w T. E, I L i a?WW I i m April 18, 1939. A. KRASA BAG FILLINGMACHINE Filed Aug. 9, 1952l0 Sheets-Sheet 9 INVENTOR April 1 8, 1,939. AJKRASA BAG FILLING MACHINEFiled Aug. 9, 1952 10 Sheets-Sheet 1O nix-3251, I: I 97/4)?" I INVENTORPatented Apr. 18, 1939 UNITED smss P T T *O I mul 'nrl a m I j A swims.n m s am aw i. 1982, mm Claim. .(cl. ass-4s) One of the objects of theinvention is to provide amaehine that will fill bags of large capacitywith a high degree of accuracy in'weights. This.

Another object is to provide a machine that will fill a valve bagsupported on a movable car- .riage, convey the filled bag away fromthemachine toremove it from its spout, thence discharge Y it from thecarriage in'a-manner that will seal the bagat the valve. I

Another object is to provide a machine that is fully automaticin-operation to insure high production and low operating cost. Theplacement of a bag onthe inactive filling spout and applying itsrespective bag-holder is the only'fmanual- -.labor required.

. Another object is to provide a machine the automatic operation ofwhich is automatically stoppedby the failure of the machine operator toplace a bag on the inactive spout and applying its bag-holder to gripit, during the interval of 'arrowsl-C inFlg. 1 after thebag shownin saidAnother object is to providea means whereby filling the bag on theactive spout. v

the trip on of the scale to drop acharge is not actuated when theinactive spout is not provided with albag in a manner described above.

Another obiqzt isto provide a machine" having a valve for closing thedischarge orifice of the ejector unit that is normally openduring theflllingof a bag and isclosed during the interval of alternating thespouts, that will prevent the opening of said valve whenthe-inactiveshifting into flllingposition is not previously pvidedwithabagintheregular way. 40 Another object of the invention is toprovide a means that is controlled by the iilling material in the feedpipe for actuating the intermittently operated mechanism. Another objectis to provide an improved in for compacting the material in the bag asit is being filled. I

Another object is to pr'ovidea means for guiding the bottom endpi' abagsuspended on the inactive spout to bring it over themiddle of the bagsupport when said spout is moved to illling position;Otherobiectswillappem'asthediscourseprowhich form avoftliei'ightsideshovvingabaginprooessofillling on the left spout. Aportlonot the'right spout is'broken away to show more clearly thebag-holder gripping the bag on the left spout. The crankandconnectingrodoperatingthedis- 5 charge carriage and the-back end of the frameareillustratedbrokenawamasarealsothefront ends-of the auxiliary base,rails and guard bars for said carriage.

.r'igzisanelevation of the right sideofthclodischargecarrlageinoperationwdischargea bag that'w'asfllledon-the rightspout.

1"lg.-3isafrontelevationshowinganempty n the left spout grippedby thebag-holder thebag-guide'rods. The carriage isreturna. to, fillingposition-after a bage isaplanviewof mbelowthe\Thebevelgearcovendischargecarauxiliary'baseareremovedforthe tclarity..5isafrontelevationwiththefrontframe v The feed-pipe, ejector unitandvthe electric switch are also removed to expose the n operating backof them. a Fig.6isaplanviewofmbetweenthefigurehasbeenfllledanddischarged. Theoperative position of the bag armNils clearly shown Su ported on a fragmentof the right side-plate aFig"! isaverticalcross section ofthefeedpipe and ejector cylinder toclearly expose the clutch controller pivoting in a recess, the rotatingelectorandthelevelingpropeller. w

I'igi8isaplanviewoftheejector. Afragmentofanarmisbrokenawaytoexpoeethefront end of the plate 2| overlapped by the arm.

ll'lmilisabottomviewodtheelector,

1"ig.10isa.perspectivevicwofoneof theplatullonthee'jector -11 llisaticviewofa'mercury switchadaptedforoperationbrthcclutcheontroller. I v

1'Ig.12isasideviw oftheeleciricswitchalng 4thelineindicitedbythearmwsll-llinlgflk.l'lg.l3isanelevation'lookingfruntheflght siiieofthemachine,ofgclutch,auillulflillll' foractuaflngit. I

HgMisanelevationofthesameIn-rtsiufi.13lookingfromthebackemloftheimchiue,-

l lgJiisacrosssectionofthekeyandttlal- Ii -Ilium. 1s.

Fig. 16 is a cross section of the parts indicated by the line betweenthe arrows i8-il in Fig. 14. Fig. 17 is a plan view of the ejectorcylinder, valve support and valve, and the spout carrier,

all in cross section along a' horizontal line pass-"i the end of one ofthe arms 22 oi the ejector hav-' ing the projection 22-3 ior thrustingmaterial against the controller plate Ill-C.

Figs. 22, 23 and 24 are views of the parts looking in the direction ofthe arrows 24-24 in Fig. 6. Fig. 22 shows the parts in normal positionwith the left spout in. filling position; Fig. 23 illustrates the rightspout moved into filling position and the valve-opening pawl I39diagrammatically disenaged from the valve-operating stud Ill by the rodISB-R; Fig. 24 illustrates the partsat the completion of the operativecycle begun in Fig. 23,

leaving the valve closed.

Fig. 25 is an enlarged view 01' the'bag-holders as illustrated in Fig.1.

.Fig. 26 is a cross-sectional view of the feed pipe showing the clutchcontroller Ill-B diagrammatically suspended in the recess of said pipe.A fragment oi the cylinder II and ejector arm 22 having the projection28-3 are also shown in cross section.

Fig. 2': is a cross section of the plate In at the line 2l2'l in Fig. 3to illustrate the reins in the plate. K

Weighing scale and feed #98 well known types of scales thatautomatically weighs the material forming a charge and is adapted todischarge the weighed material by manually operating a charge tripdevice. herein illustrated as a lever. This lever when released by theoperator is adapted to return to its normal position. 'When said leveris held in position to discharge the scale, ior a long period of time,it will cause the scale to repeat as fast as the material is weighed. Tooperate said lever automatically and avoid repetition oi dischar ing bypermitting the lever to return immediately to its normal position, thefollowing described mechanism is used:

The manually operated lever described above is provided with the tail 5which is normally held against the underside of stop 6 secured to thelever, by spring 1. It is apparent that the dog is contacted from aboveby a member the lever 2 is moved with it and when contacted at itsunderside it alone is moved on its pivot.

Lever 8 is pivoted axially parallel to the lever 2.. Whenin normalposition,itis p-cd stop 9 by spring II; and itsend 8 4 and adapted tocontact it. What by rod l2, the upper end of which islooldycom' nectedto the lever, end ll of lever I contact landswingsinitsarcotmoyemmtabmtpivoted center of lever 2 in a M actuate the discharge mechanhn o! thescale. after which it 1 terminating the contact betwem it and the andpermitting leveritogberetmnedtononnal position by spring ll.

During the return movement of lover I to normal position it contacts thedog in its underside, lifting it sufilciently to pass it. The (log ureturned to normal position by spring I.

Theliited dog and thenormal politionoi lever i are diagrammaticallyillustrated in Hg. 1.,

Lever l, as illustrated, is held at its down position 7 "by rod 12; Thecause for this will he explained later. The weighed charge oi illlingmaterial, after it is discharged from the scale is received by thevertically disposed feed pipe which directs it by gravity to adischarging wait for filling receptacles.

Although a one-piece pipe would fulfill its purpose equally as well, thefeed pipe is preferably made in two sections ll and A, for conveniencein handling to make adjustments and repairs. The sections beingsuitablycinnectedto each other, the upper or intake end of the feed pipeis connected registrably with the discharge opening provided in thescale in any suitable manner.

The interior of the feed pipe has a gradual outward .taper beginning atits intake opening and terminating at its outlet opening thus forming acone of the filling material which is sligh ly mpacted by the drop fromthe scale. This is for the purpose oireducing the frictional resistanceof the filling material against the wall of thepipeinitspassagethroughitandtoredueeto a minimum any possibility oi! itadhering to'the P D Ejector unit The preferred embodiment fordischarging the filling material into a receptacle-is the conventionalejector type with improvements as noted.

The vertically disposed ejector cylinder II is provided with atangential discharge orifice ll andabottom ll. Theuppermostsln'taceoithedischarge orifice is preferably below the top of the cylinder to'provide a continuous wall for the orifice integral with the cylinder. 0

Vertical shaft ll operating ejector 22 passes through a central openingin the cylindebottom and extends upwardly into the feed ripe.

To prevent the escape of iillim material and dust through said opening.there are provided a sleeve projecting upwardly from the cylinderbottomand' a stumng box 2| projecting downwardly from it.

The top end oi. the cylinder is closed by a cover 2| having a centralintake opening. The cover is suitably connected or united with thebottom end of the feed pipe with thdr respective openings in register.It is illustrated cast to the pipe. Cover 2| is preferably made with aprojection at its bottom side, fitting closely the bore of the cylinderand extending to the uppermost surface of the discharge orifice. I

. Ejector 22 operatinginthecyiinderbetween cover 2i and cylinder bottomII is secured to the revolving shaft it. It is comprised oi. a hub ofthe front sides extends inwardly from the end having a plurality ofradial arms 24 projecting horizontally therefrom, and bottom plates 24.Ejector arms 24 are preferably. made with their front sides 25vertically disposedand tangent to the hub. The concave surface It milledon each ofthearmtoasfarasthemillingcutterwill permit. Its purpose willbe explained later.

The back side or shield II of each arm slopes rearwardly from the topside terminating atthe gap side 24 of the arm for the purpom ofshielding the front edge 34 of the plate 24 from material gravitating tothe ejector. The bottom side of each arm is provided with a seat 2!extending the length of the arm to which the plate 24 is secured.Projecting to the rear of the seat is the gap side 240! the arm.

when secured to arms 2! the plates .24 constitute the bottom of theejector 22 for carrying the filling material gravitating from the'feedpipe. Each plate projects forward from its seat 29 with its front endbelow the arm in'advance, thus forming a gap between them, mg. 'l. The

forward end of each plate is inclined toward the cylinder bottom l1 tillthe front edge 30 is in very close proximity to it. This is for thepurpose ofscooping up the material that has leaked down on the cylinderbottom, and returning it to the upper side of plate 24.

Because of the overlapping of the arm. past the front end of the plate24 to its' rear and because the material on said plate, from centrifugalforce generated by the high speed of the ejector,

is held toward the front side I! of the arm supporting said plate,leakage of material through the'gap is impossible.

In the foregoing description four gaps for an ejector having four arms.In

use with some materials; there is.an advantage in having only two gapsfor an' ejector having four arms. This is accomplished by spanning twoof the arms with a single plate.

In operation, the ejector 2! revolves at high speed. Because of it thefilling material entering the cylinder i5 is violently contacted by thefront sides 25 of the arms and is cmnpacted toward their middle by'theconcave surfaces. 24. This increases the efficiency of the ejector sincethe a discharge o'riilce being preferably round, provides and base 31are suitably secured to each other forming a dustproof housing formechanism operating therein.

The right frame is away from the right ends of frames}! and 44 to per--from outsid opening in frame 84 through which the mechanism inthehousing is oiled and adjusted. I

.mit driving the of said frame. v w Cover plate it closes an Operatingin bearing 34 secured on 41, the main shaft 4| shaft .II by bevelgears42 and. liearingflisiihlstrated in Fig. 5 with a portion of' its broken'awaytoclarifythemechsnismbackofit.

Acp'redopenifiginframellprovidedforshaft4lisclosedbyplate44tokeep'outdustfrom there are provided An elongatedopening in.the .bottom .ports'the I to an exten sion flAof base 31 andbearing 44 mounted -70 notches-4t of the engagement-disc by a saidhousing. A reamed hole in said plate freely v receives the shaft.

A pulley 4! drives the shaft 4| from a source of power by a belt. I

Bearings 44 and '41 having keyways 44'cut in their clamping surfaces aresecured to frames 33 'weight against the lower bearing 44.

Bevel gear cover 52 is-made in halves as illustrated by the sectionbroken away from the front half: The halves when secured together aresupported by bearings and 46 on their exterior surfaces adjacent theirends. Set screws secure the cover to the bearings.

The speed-reducing unit "is of the conven tional gear type for reducingthe main shaft speed to a speed suitable for driving theintermittently-operated mechanism and the continuously operated shakermechanism.

Secured to shaft 4|, the spiral gear '4 in mesh with gear 55 operatesshaft 56. Sprocket I! driven by shaft 58 of reduced speed revolves theclutch engagement disc 64 by the sprocket 44.

A roller chain 60 connects the sprockets.

Clutch unit I The clutch unit is an improved design of one i of the manyconventional intermittent clutches developed for revolving a given shaftonce for,

each engagement thereof.

Cam shaft 6| rotating in bearing '42 mounted to base 31, and bearing 63provided on frame 36, supports the continuously revolving clutchengagement disc 64 having the hub upon which the sprocket 59 is securelymounted.

Along the periphery of the disc are a plurality of notches $6 cut acrossits width for freely -re-' ceiving the engaging key 41. The side of thenotch in advance of the driving side is given a bevel. to permit thegradual entrance of the engaging key into the notch Member 69 secured toshaft 4| resembles a webbed iron belt pulley having a flange II and arim II illustrated with a portion broken away.

Integral with said member isthe support 12 for the engaging key 61extending from the outer edge of rim II to close proximity of engagement1 disc 44-. Key '1 is slidably held'in support I! by plate I4 secured tothe support. x

-of the support extending inwardly from its end adiacent to theengagement disc 44 is provided to admit stop pin 14 pressed in the key,Fig. 15. Bumperliisintegralwithrimll andsupportshead us of the key whenengaged by stop lever is to stop thecam shaft; The fhnge l4 supstoplever sidetln'ust when thekey from engagement'wlth disc byplatellwhichissecuredtoslmportflfor the Notch," cut across the flangell-is engaged the key. Stop pin I4 limits the movement 01' the key i!when pushed by spring II by contacting the engagement disc 64 at itsside. when in this position the undercut side I! of the head of the keyis away from the plane of flange I. suflicientiy to permit entrance ofthe knife edge 02 of stop lever I6 between it and the flange.

Mounted to base 31 bearings I! support the pivotal shaft 84 of stoplever 16. r Stop plunger 85 slidably supported by hearing "A iscushioned by spring li, bearing against stop collar 81, which is pinnedto the plunger. The bottom end of the plunger extends below the collarto hold the spring in place. The lower end of spring 86 is supported inplace by a flanged stud 88 secured to the stop lever.

Bumper-head I9 rigidly secured to stop plunger 85 receives the blow ofmember I in stopping cam shaft ii by engagement with the head "A of thekey. The bumper-head is sufilciently away from the hearing "A to permitcompression of the spring 86 when the said shaft is stopped, therebyreducing the shock to the parts involved. The bumper-head is preferablysquare in shape with one side freely abutting the same side of the stoplever in contact with the head "A of the key .when said key is fullydisengaged.

The upper end of the stop lever is wedgeshaped for withdrawing the key Hfrom engage- -ment with the disc 64 at the completion of one revolutionof the cam shaft U. The operative side of the wedge-shaped end of thelever is provided with a transverse taper "A (see Figure 16) thatconforms with the under-cut side I! of the head 61A of the key topositively hold the stop lever in place during the withdrawal of the key61 from the disc regardless of the strain applied to it.

Arm 90 operates stop lever 18 to disengage it fronnthe key-head 61A.I'he operative end of said arm is bifurcated, across the opening ofwhich a-pin Si is secured for operative engage ment with trip bar 92.Pin 83 similarly secured,- prevents derangement of the trip bar withsaid arm.

Trip bar 92 is pivotally supported in the slotted end of the verticallydisposed plunger 14 which is upwardly actuated by solenoid I.

Notch 96 is cut in the trip bar for hooking the pin 9| whereby the stoplever II is disengaged from key 1 when plunger 04 is actuated. A spring91 resiliently presses the trip bar against 'lheoperationoftheclutchbeginswiththe actuationoftheplunger llbythesoienoid lb.

"The tripharfl beinginhookedengagement with thepinllatthenotchltispulledupwiththe plunger, wherebythe stoplever "is movedoutof 'ent with theengagingkey permitting -thekeyto 88ge0neol'thendtchesflin'the 7g continimsiy disc 04. Beiore'compleinsulates therod from the socket.

tionofonerevoiutionoltheshait,camlldisthe tripbar I! from pin OI,whereby the stopiever-I'isreiessedandreturned against the i'aceotrlm llbythespring lll,inpositionto disengage thekey 81 from the revolving discM andstoptheshaftbytheent ofbumperhead I! withthe head "Aoithekey.

The clutch controller unit The clutch controller Ill operating in thesection A of the feed pipe is preferably a ring supportedbya shankhaving a topsuri'ace IMA that will shed the filling materal on it afterthe controilerhasmovedoutofthematerialbeingdischarged. 'I he annularconcave groove I02 at the bottom of the ring, illustrated at the brokensection (Fig 'I), lightens and strengthens the ring because 01 itschannel-like construction.

Sidewalis I of a recess provided in the feedpipe support for a pivotingshaft I" to which the shankof the controller is secured. Said bearingsare preferably bushings having longitudinal secured adlustment in wallsI03.

Astop lug III onsaid shank contacts the wall of the feed pipe to limitthe downward movement of the controller as indicated by the dottedlines, Fig. 'l.

Whm the charge of filling material is extremely heavy it is better toeliminate the stop IIS and provide a stop stud fixed to the wall of thepipe diametrically opposite to the pivotal shaft of the controller andadapt the controller for contacting it for the downward stop. This wouldsupport the controller against the heavy thrust of the dropped charge onit.

Felt washers I" are interposed on the shaft between the sides of theshank of the controller and the inside ends of bearings III forpreventing leakage of dust and material from the feed pipe into thebearings.

Shaft III extends past the outer ends of said bearings. A collar -Hi8 issecured to one end of the shaft and socket III! at the other end.

Switch rod III is made of materiai suitable for completing an electriccircuit through it and is secured to the socket I". A fibre bushing IllThe downward movement of the rod is stopped by I I which is insulated toprevent grounding of the circuit.

Switch clips H2 made of resilient, electrical conducting materials areterminals of an electric circuit which is operatively completed bycontact of the rod-I ll withboth clips, 8. 12.

Haunted suitably on frame top 32 a fibre block i ll supports theinsulated clips in staggered relation to facilitate cleaning theircontacting surfaces.

Weight Ill having a slidabiy secured adjustmentmswitchrod Illcounteractsthegravityof controller ilfandcausestherod llltoclosethe saidcirwit. flhe controller is in normal positionwlmnthesaidrodlsagainstthestop Ill.

The above described method of completing the circuit is sometimesobjectionable because of a spark that may be produced at the clip inbreakingthc circuit. Insuch casesthemercury switch is employed (Fig.11), the description of which Acmtainer III for holding the mercury is.clampedtorod lllwithafibrebushing Iilinterposedfor insulation. Aportionof theciampisiilustratedbrokenawaytoexposethebushing. Anopeningattheouterendofthecontainerisciosed with a threaded plug HIA toseal it.' A flange-' headedstud lllissecuredtotheplugwith its.hesdinsidetheoontainer.

.The'outer end ofthestudis connected with oneof the wires of thecircuit. The other wire is connected with the container atits clampscrew. me stud and container, thoroughly insulated from each other andfrom the machine, constitute the terminals of the electric circuit;

With the mercury switch, the rod H is preferably a tube for carrying theinsulated electric \lv.ires which enter it through a hole in the socket9. r 1

The container is partially filled with mercury II, which operativelycompletes the circuit by gravitating into contact withstud II! when rodIll isturned downwardlyby weight i i I because oi it overcoming thegravitational pressure of the filling material on the controller Ill.The downward movement of the switch rod is stopped by the stop rod IIIwhich is suitably supported on frame top}! and preferably insulatedtherefrom. When the controller iii is thrust to its down position by acharge of filling material, rod iili "is turned upwardly, as indicatedby the dotted lines (Fig. 11) to a position causing the mercury ingravitate away from contact with the stud ill, breaking the circuit.

. The conventionally illustrated solenoid 9i having the plunger isconnected in the aforesaid electric circuit and is of the conventionaltype for operating the plunger in a single direction, preferably anupward one, as illustrated.

' When the circuit is automatically broken by the rod ill, the plunger04 is returned to normal position by gravity or by a spring. a Thesolenoid is secured to the bracket ill which I is mounted to the base 31and adapted foruse as a guard about the clutch unit.

Fig. 3 illustrates the service wires providing the current-to the saidcircuit, broken of! below the hand switch which is secured to the frame33. The hand switch disconnects the current from the circuit when themachine is .not in operation.

In operation, a charge of filling material dropped from the scale intothe feed pipe thrusts the" controller from its normal position,downwardly, to-be stopped by its stop lug I06, conta.ct-'-ingthewallofthefeedpipe. Itisheldinthis position, ina buried state, bythe material above it gravitating to the discharging unit. Because ofthe thrust'given the controller, the electric .e isshuplymxen.

thecharg'edroppedfromthescaleintothefeed,

pipe isfrom it and the 'mT'ejector, very accurate weights in the filledbag I The t of another rot-in or p 7': that is operated away from itsnormal position by a nrechanically produced force, is illustrated inFig. 28. A detailed description of it follows. The feed pipe and ejectorunit in the foregoing description are used with changes as here noted. 6A fragment of each is illustrated in cm section The clutch controllerIll-1B operating suspendedly in a recess-projecting from the interior ofthe feed pipe is comprised of a plate IIIC, 10 having a shank forsupporting it from the shaft IDS-B. The shaft iii-B is pivotallysupported in the same manner as that illustrated in Fig. 18. The recessextends downwardly in a vertical manner to the ejector 22. The wall ofthe feed 15 pipe at B extends below the top end of the recess forming aninclosure for protecting the shaft IOL-B from material in the feed pipe.An

I opening at the top end of the recess, provided for making adjustmentsof the parts assembled 20 on said shaft, is closed by a cover plateill-B. Switch rod IIOB suitably secured to shaft iii-B is operatedbysaid controller to open and close an electric circuit. It ispreferably a tube so that an insulated wire for conducting an elec- 25tric current to contact point 3i i can be carried in it. Point iii isinsulated from the rod and secured thereto in any suitable manner.

Contact point an illustrated in contact withpointtiiisfixedtoanendofa'resilientstripio 313 of electrical conductingmaterial. The other end of said strip is fixed to a bracket III which ismounted in an insulated manner to the feed pipe. Points ili and m areterminals of the aforesaid electric circuit in which the aforesaid 85solenoid is connected.

When the stop ill-D, provided on the shank of the controller, is incontact with the wall'of the feed pipe at B the controller ill-B is innormal-position. 40

The weight Ill-B securedto rod iii-B coimteracts the gravity of thecontroller to keep it in normal position when the feed ,pipe is empty.thereby causing a contact between the-points 3 and). The pressingcontact between the 5 points is regulated by the adjustment of'the'weight on the rod Ill-B.

A projection NB having a front side :63 that inclines forward from thefront side 2! of the arm ilisprovidedoneachofsaidarmsofthe 5o ejector22.- The front sides of said projections are inclined just enough toprovide a-constant supply of material to the ejector unit. A crosssection of an arm and said projection is illustrated in Fig. 21. Theprojections operate in the opening provided at the bottom end of'thefeed pipe which is,-in fact, the intake opening of the ejector cylinderII. The plate ill-C of the controller is positioned opposite to the pathof the rotating. projections. 00

forceexertedbythethrustmaterialmflidcntlyes overcomes the gravity of thecounteracting weight ills-B to the controliq, in it forced movement awayfrom normalpoeition, to sharply break the electric circuitat the points-Ill andlll. 'lhepoaiflonsofthecontrollerand 1oeiectionofa'chai'gefi'ointhefeedldpekeeplthe.

away from until the 7 orifice I. before spout carrier I" is lhiftedtnmaterial above the ejector 22 is so reduced in quantity that the forceresulting from the thrust is insufiicient to overcome the gravity of theweight IIIB, wherupon the controller is returned to normal position andthe electric circuit completed.

With this type of controller the leveling propeller I 22 and theapparatus for delivering compressed air to the recess is not required.

By eliminating the projections 223, the controller Ill-B can be actuatedby the side pressure of the material in the feed pipe.

Leveling propeller The unevenness of the top surface of the fillingmaterial, as it may be before it is leveled, is indicated by the brokenline I24, Fig. 1. The r0- tating propeller fitting closely to the wallof the feed pipe undercuts the material of the high side when the lowside is approximately even in height with the propeller. Theundercutting causes the material to be violently dashed about, fillingthe hollows in said top surface. This action is continued until the topsurface is lowered by eiec-- tion, even with the low side of thepropeller, at which position the propeller gives the material a scrapingaction, producing an even and level.

surface on the material.

The propeller I22 also performs the function of breaking up the lumpsthat may be in the material by its high rotating speed.

Valve-operating mechanism The valve mechanism for closing orifice I6 isactuated by cam I25 secured to shaft 2|. It

operates a vertical shaft I26 by lever I21. Roller I22 operating in thegroove of said cam is supported by lever I2'I. The projecting end ofshaft bearing 62 abuts the cam at a recess provided to receive it. i

Bearing I22 mounted to base 21 and bearing I22 provided on frame top 22support shaft I22 which is provided with a ball thrust bearing I2I forcarrying its weight. A collar, not illustrated, abuts the lower end ofshaft bearing I22 to prevent end movement of the shaft.

Rock shaft I22 having operating lever I22 is operated from shaft I26 bythe lever I24. Lever I22 extends upwardly from the rock shaft through acored opening in frame top 22. I

' A connecting rod I25 provided with a ball joint at each end. connectslevers I22 and I24. length of the rod is adjustable to positionthedischarge opening I-42-A in valve I42 in register with discharge orificeI6.

Bearing I22 mounted to frame top 22 and hearing I" on .frame 22 supportthe rock shaft I22 having a lever I 22 for operating pawls I22 and I42.Both pawls are pivoted to lever I22 at I. End movement of rock shaft I22is prevented by lever I22 and a collar abutting the.

ends of bearing I22.

A plate valve I42 operating slidably in a guideway in valve support I42class the discharge The alternate the spouts. 'Itls opened when theinactive spout having a valve bag gripped by the bag-holder is shiftedto filling position by the spout carrier, and the discharge carriagereturned to support said bag. The valve is normally open when thedischarge opening I42A provided therein is in register with saidorifice. It is held in the guideway by plate I44 secured to the valvesupport. I

Valve support I42 extending horizontally pastthe discharge orifice I2 iscast integral with cylinder I5 at the outer end of said orifice. It-isprovided with an elongated opening in said extension through which thevalve-operating stud I42 passes. 'The said stud is rigidly secured tothe valve.

The valve is opened ,by pawl I22 in engaging contactwith stud I45. It isclosed by pawl I42 in engaging contact' with the opposite side of thestud.

When the valve is in closed position the pawl I22 is adapted to belifted out of engagement with the stud I42 under a condition to beexplained later. When thus ed, both pawls are out of engagement withsaid stud in the valve-opening movement of the operating lever I28.

When the pawls are in operative engagement with stud I45 they aresupported in position against gravity by it. When out of engagement,they gravitate to the stop plate I42 secured to support I42, Fig. 24.Ends I" of both pawls are inclined forwardly to lift the disengagedpawls gradually into engagement with the stud. Where conditions requireit, the pawls can be resiliently pressed to stud I42 by springs arrangedon the lever I28.

The upwardly extended arm I22-A of pawl I35 has a laterally projectinglug I 42 provided with outwardly inclined extensions I42 and I52 for thepurpose of disengaging the pawl from the stud I45.

Strap Ill supports the arm I22-A against side thrust when the pawl isbeing lifted out of engagement. The strap is not illustrated inthegeneral assembly views.

Under normal filling conditions the valve is used primarily to preventthe exhaust of dust from the ejector unit into the air during theinterval between the removal of the filled bag off its spout and thecompletion of movement to shift the inactive spout into fillingposition. It canalsobeusedtocutoifthefillingmaterial being ejected intoa receptacle when the controlleris podtioned so high abov :the ejector22,

thatifallofthematerialin *feedpipewere stud I42 when the valve isbeingopened, whereby the scale is tripped to drop a charge.

Normally when the valve is opened, the lever mm in contact with m usuntil thevalveifls clom again. Became of it, lever 2 on thesca'le Isheld to its down position during the filligg of areceptacle. 7

Spout carrier mechanism swimmer IIGisalidahlyheld sgainstplate I44 bydove-tailed guide bars I" and I22, Cap

'screws'secure the guide bars and plate I44 to valve support I42.

Thespout carrierisprovided with twofillim spouts III and lltR which arealternated into register with discharge orifice ll of-the elector unit.The mechanism operating it follows.

'Cam shaft ll operates cam I on the shaft III by bevel gears"! and I atone-half its operating speed. Cam I" shifts spout carrier lit to movethe inactive spouttofillingpodtion bearings I'll which are mountedtobaseTI. The

shaft.

shaft I65 by the connecting link I".

said lever and'a collar il! abut the inside ends of the hearings toprevent end movement of its Rock shaft Ii pivots in a bearing providedin the support I" and bearing ill on frame a; The support I" illustratedin crosssectionin Fig.4ismountedtoframetopl2. l

Lever ili operates the spout carrier from rock Spout carrier lockingmechanism Spout carrier locking block I'l'l, clearly illustrated in Fig.20, secures the'carrien firmly, against plate I afterit is shifted toalternate the spouts. It is operated by lever 'I'It which ilgturn isactuated by cam lll secured to shaft Lever "I pivots on a stationarystud I. mounted'suitably on frame top 32. It is provided with a rollerfor contacting the cam.

' ing with'discharge orifice II and recesses I02 One end of theconnecting rod Ill passing freely through openings in valve support Illand plate I, is suitably secured to the block I". The other end isprovided with a threaded socket having a bifurcatedend which pivots onlever Ill. Adjustment for the locking block is had at the threadedsocket. A lock nut secures the adjustment. V

Locking block I11 operates in a notch machined in guide bar I", Fig. 20.In operation. it functions as a wedge between the guide bar and thecarrier in. Because of excessive wedging angle, the grip of the block onthe carrier is released when its cam I'll is moved to inoperativepofltion. v i

Plate 144 with; recesses I Plate I is provided with anopeningregisterextendingto thebottom edge of theplate. The ;v;-;;; sharp,vertically dim mlnersarejuxtaposedto thebackside ofthespout carrier litfor removing the fine particles of material lodged on said carrierduring the filling operation,byascraping actionproducedbythe movingcarrier in contact with thesaid corners.

" viduaiiy operated for sl pp a h s i 9 inetm propotticuatalgwith a 1sthe guideway. e 10' on carrier lil has holder that is obscene 0Eachfilling spou ventional type ti'veness that force'tending'to removeit from the spout.

spout carrier lll.

r on the other spout. The bagholder thus ap- Bag holders m and. "sesameserrated bag-holding surfaces Ill are pivotally supported on a fixedshaft I carried by bracket I on Springs Ill. hold the bag holders ingripping contact with valve bags placed on their respective spouts by anoperator. Handles I and "IR are for manually applying the holders tosaid bags to check the pull of said springs'and for making adjustmentsof saidbags on th Latches I and IIIR respectively pivoted to the bagholders at Ill, operatively engage their respective pins Isl whereby thebag holders are held away from their respective spouts to permit theplacement of valve bags thereon.

Bprings III resiliently press the latches into engagement with theirrespective pins m which are secured to bracket Ill.

Integral with their respective latcheathe man- =1 ually operated tripfingers lit and "3B disengage the latches from their respective pinsill.

Latch stops I contact the bag holders to limit the movement of theirrespective latches pressed by their springs I02.

.Each bag holder iaprovlded with a' convex projection I .that isoperatively engaged by the end- 200A of the push rod 200 to remove thebag holder frpm'the bag after itis filled and to} move it into latchingengagement with its pin Ill. The bag holder is thus latched during movement to alternate the spouts and remains thus until manually disengaged.4

Rods lfl'and "QR are slidably supported im-ss Ill and "IR providedonspout carrier I". Each rod is operated by a bag holder. The links I" andit'll. conneckthe bag holders with the rods. I v

. Rods lit and IICR are for. the purpose of dis-= engaging pawl-i3! fromstud I to prevent the automatic opening of 'valve I42 and to prevent thetripping of the scale to drop a charge into said feed pipe, when the bagholder of the spout being moved into register with said orifice is.engagedly latched to its respective pin ill.

Normally, theemptybags areplacedonthe spout. and the bog holder appliedby the machine operator during the interval of filling the bagpliedmoves'its respective ,rod out of operative engagement withthe lugill. I I

'After a bag is filled the bag holder gripping it. is automaticallylatched to its pin 10:, thereby moving its respective rod into positionto en--- gage lug i in the next movement of said carrier to shift thespout of said latched bag holder -into filling position. If the saidlatched bag holder is undisturbed before the next movement of saidcarriertoshiititsspout intofilling pool- .0 tion, its respective rod'ismoved by the carrier into contact with its respective inclined extension(ll. or ill) of the 'lug Ill, thereby lifting the'pawl ill gradually outof ent with stud I, after which the rod slidably supports the lug I inlifted position to prevent engagement of the pawl-with said stud duringmove-' ment of the lever I38 to open saidvalve. This isdiagrammaticallyqllustrated in Fig. 23. x By thus "the pawl mfromthevalve operating stud I, the discharge orifice It remainsclosedafter the said spout having mechanism is actuated only when thevalve is moved into open position. This is for the pur pose,inthecaseoffailunetoplacea bagonthe spout during the interval of filling abag on the other spout, to prevent the discharge of material onto thefioor when said spout is moved in the filling position, and to stop thecontinuous automatic operation of the machine, which depends on thedropping of the charge in the feed pipein timed relation with theintermittently operated mechanism.

To resume the automatic operation of the machine after it is stopped bythe aforesaid condition, a bag is placed on the spout which is now infilling position and its bag holder applied to grip the bag. The valvelli is then manually moved by the valve extension lll into openposition, thereby'causing the stud lll to be in operative contact withthe pawls ill and Ill and causing the'actuation of. the discharge mech-'anism of the scale to drop a charge.

Where conditions do not require a valve to' close orifice ii, the scaleis prevented from dropping a charge by a movable member which is adaptedfor operation by pawls in a manner similar to that of the valve in-theforegoing description, and which is provided with means to engaglnglytrip the scale.

Push a mechanisin Push rod ill is slidably supported in bearings onbracket ill which is secured to lug ili projecting from cylinder ll.

Cam ill. secured to ll operates push'rod ill by thefollowingintermediate mechanism.'

' A bell crank having levers ill and ill pivots ,on a shaftthatissupported from base ll by a bracket ill. The cam actuates leverill by a roller 2 which is held in pressing contact with it by spring2'", Fig. 4. r

Discharge carriage assembly The discharge carriage supports the bagduring semhly follows.

the filling operation after which it conveys thefilledbagawayfromthemachineto it. The description of the dischargecarriage as The auxiliary base iil is suitably secured at one end to themain base 31. The opposite end is secured to the floor in a substantialmanner.

Rails iil secured to baseiil substantially par- 5 allel with the axialline of discharge orifice ll,

support frame iii of the movable carriage by flanged wheels iil whichare journaled on flangeheaded studs iil secured to the frame.

The carriage is operated by crank iil rigidly secured to shaft ll,abutting shaft bearing ll.

Connecting o 22: connects the crankwith the bifurcated lug iilprojecting upwardly from the carriage frame iii. It operates through acored opening in the front frame ll.

' 1 Wheels 22: are provided with outwardly pro- Rock shaft ill providedwith operating lever jecting bow iil which operate in close proximity toguard bars iil and iil-A to prevent derangemeht of the carriage with therails. Brackets ill securethe guard bars in parallel alignment with therails to base iil-illustrated abutting the sides of the rails.

Lugs ill and illA projecting upwardly at the front end of the frame havea plurality of spaced splines ili cut horizontally across their frontsurfaces in longitudinal alignment. The base of the bag support bracketill is provided with a pair of feathers ill in longitudinal-alignmentwhich are spaced apart to respectively fit in one of the splines of eachlug, for maintaining its horizontal alignment throughout the range ofadjustments on said lugs. Provision is made to secure bracket ill ateach adjustment. The adjustment of the bag support bracket is necessaryto fill bags having a wide range in lengths.

Bearing ill on said bracket pivotally support shaft ill to which one endof bag support rocker .231 is secured. Theopposite end of the rocker isengagingly operated by the shaker arm 238 during the bag fillingoperation. Collars ill abut the'bearings to prevent end movement ofshaft ill.

Shaker arm ill is provided with a roller ill for operative contact witha hardened plate il-l secured to the under side of the rocker ill. Incases where a high operating speed of the shaker arm is required with aminimum operating noise, the rockeris suitably bifurcated to closelyrecelve roller ill of the shaker arm.

By the movement of the carriage to discharge the filled bag the rockerill is moved out of engagement with roller ill of the shaker armwhereupon the rocker il'l gravitates to stop pin ili which is adjustablysecured to frame iii.

Provision is made at ill and ill for up or down adjustments of the bagsupport ill on the said rocker to suit bags of varying lengths within aclose range.

Rocker il'l is provided with the discharge operatingarm ill. When thecarriage is moved a predetermined distance. to discharge the filled bagthereon, arm ill engages the rotably secured roller ill, causing the bagsupport ill to be upturned quickly, whereby the said bag is tilted fromthe carriage with'a slight thrust at the completion of said dischargingmovement. The thrust given to the ti'ltedbag causes it to be partiallyupset when it strikes the means for receiving it-usually a movingconveyor. The imiustment of the stud is had by threaded nuts whichsecure it to the lug.

. Whenthecarriageisreturningfromdischarge,

the bottom end of the bag on a spout moved into filling position entersa channel ill provided in the middle of the bag support ill. The channelis flared outwardly at ill to facilitate the entrance of the bag.

A wall in across the front end of the bag support prevents the filledbag from sliding of! the support during movement to tilt it, Fig. 2.

Carriage .side plates ill and ill provided with lateral adjustment tosuit filled bags of various thicknesses, are secured to the top side offrame iii. Suitably reinforced with ribs, the side plates prevent thefilled bag from falling sideways during the discharge movement.

Bag arm 265 is secured to the shaft 266 pivoting in bearings 251 on sideplate 254. In operative position the arm extends horizontally past therear end of the filled bag adjacent-to the spout to remove it therefromby a pressing contact caused by the discharging movement of thecarriage.

Lever 253 secured to shaft 266 is engagingly operated from contact withstud 269 fixed to the operating lever 266. Operating lever 266 is freelymounted on said shaft abutting the bearing and lever 256. Collar 26!abuts the other bearing to prevent end movement of shaft 256.

Connecting rod 262 connects lever 266 with cam lever 263. It is madeadjustable to set stud 259 in exact relation with contact lever 256. Thecam" lever is pivotally mounted on lug 23 l-A It has the roller 264 forengaging the cam 265 secured to the guard bar 223-A. 1

In the discharging operation the bag-arm 266 remains in operativeposition after the filled bag is removed from its filling spout untilthe carriage begins to tilt the filled bag, at which time the camleverroller 264 engages cam 265, whereby the lzaag arm is turned downwardlyto engage pawl Bearing 261, suitably mounted on side plate 254, supportsthe pivoting shaft of pawl 266. The pawl is resiliently pressed intoengagement with the bag arm by spring 266. When out of said engagementits movement is stopped by 269 com- This is accomplished by providingthe arm 246 ing into-contact. with 254. I gaged from the bag arm bylever 216 which is secured to its pivotal shaft.

,During the return movement of the vcarriage to filling position, thebag arm is held by the-said pawl topermit the entrance of the bagsuspended on a spout in filling position' During the same time thelevers 266 and 243 connected by 262 return to normal position bygravity. a At thev completion of said movement the bag arm is releasedfrom pawl 266 by lever 216 coming into engaging contact with the flangedhead of pin 21.1 which is adjustably secured to frame 33. After the bagarm is released it isreturned to operative position by spring 212.Reverting back to the discharge of the filled bag, it is sometimes moredesirable to slightly upturn the bag support 245 shortly after-thebeginning of the discharging movement to relieve the spout of any bagstrain that may be on it, thereby facilitating the removal of the bagfrom the spout.

with a roller which contacts a cam-shaped bar secured to the base 226.The bar is shaped so as to give the bag support the desired lift duringthe removal of the bag of! the spout, after which it is shaped tocomplete the upturnlng movement of the bag support to discharge the bag.

When said arrangement is used, lug 249 and stud 246 supporting roller241 are eliminated.

. 'Bao guide rod assembly The apart so that when one of them is infilling position, the other is sufficiently outside of the verticalplane of one of the carriage side plates (253 or 264) to convenientlysuspend a bag from it.

A bag thus-suspended is indicated by dotted lines in Fig. 3 with itsupper end broken away. The bag hangs between the side plate anditsrespective guide rod 213 in normal position which is indicated bydotted lines in the same figure.

When thecarrier I66 is operated; the spout clearly illustrates thisfeature.

The pawl is disen-- filling spouts on carrier I56 are spaced movement todischarge the filled bag, is a suitable distance away to clear saidsuspended bag. Fig. 2 The lower end of said shifting bag is movedrelatively with its spout by the guide rod 213 contacting its outer sidewall. When said spout is finally infilling position, both guide rods,moving simultaneously toward each other, grip the bag to guide itsbottom end into channel 256 of the bag support during the returnmovement of the carriage. Fig. 3 illustratesa portion of the wall 252broken away to expose this feature more clearly. I

Just before the carriage is returned to filling position, the guide rodsreturn to their normal position passing through openings 214 in thecarriage side plates 253 and 254.

The guide rods are carried by levers/215 and 216. having segmental gears211. Lever 216 is pivotally mounted at 216 on frame 33. It is operatedby its segmental gear in mesh with that on lever 215 whichis operated byshaft 219.

Bearing 266 provided on frame 33 and bearing 261 supported on frame 36support the said shaft having the operating lever 262. 1

Connecting rod 263 connects lever 262 with lever 264 of a bell crank. Itis provided with a ball joint at each end. v

The said bell crank is freely mounted on the same shaft that supportsthe bell crank having I the levers 264 and 265. The other lever 265 ofsaid bell crank supports a roller 266 which is in operative contact withcam 261 secured to shaft 6|.

Spring 266, hooked at one end to lever 215 and its other end to a pin onframe 33, presses roller 266 against cam 261.

Shaker mechanism Shaker arm 236 is adjustably secured to thereciprocating bar 269 in relative position with bag support bracket 243so that the rocker 231 longitudinally, will be. substantially horizontalwhen in the middle of its rocking movement. Bearings 296 mounted toframe 33 slidably support bar 269.

The connecting link 29l operates the bar from an eccentric pin 292 onthe end of the rotating shaft 293. Bearings 294 and 295 mounted on theframe 33 support the said shaft.

Speed reducer 53 operates shaft 293 by sprock: ets 296 and 291. Rollerchain 296 operating in a cored opening in frame 33, connects thesprockets. The said chain is removed from sprocket 296inFig.5.

The aforesaid housing is made dustproof at the opening in frame 33provided for chain 296 by a cover 299 which issecured to frame 33.Flange 366 projecting outwardly therefrom is secured to a similar fiange361 provided on the end of bearing 294. A portion ofthe cover, bearing 5and its flange is illustrated broken away in Fig 3 to expose the saidopening.

During the return movement of the carriage from discharge, the rocker231 rests on stop pin 242. Near the completion of said carriagemovement, the roller 246 engages the beveled end of plate 241 causingthe rocker to be lifted from materialis thus compacted in the fillingoperation by the vibrations set up by the said bag port.

Compressed air line assembly The aforesaid described recess on feed pipe|IA\ is preferably made with a downwardlylnclined bottom surface 302,Fig. 7.

Some filling materials having adhering proclivities for metal, are aptto remain on said surface after a charge is discharged from the feedpipe. To remove the residue thereon, compressed distributing the saidcompressed air into the recess, preferably a plurality of holes 304drilled from its bottom to connect with an air chamber 305. Holes 304are so arranged that when air is passed through them from said chamberit will clean oi the controller shaft assembly and sweep the surface302, as indicated by the arrows, Fig. '7.

An air cock 303 of standard .design provided with an operating lever301, is used for con trolling the air to the recess. It is mounted toframe top 32 by the bifurcated bracket 308 and is operated from leverI34 by connecting link The air cock 306 is connected at one end with asource of compressed air; the other end is connected with the airchamber 305 in cover plate 303. Unions at the cock and cover plate areprovided to facilitate repairs.

Some filling materials are in a heated state at the time of. droppinginto the feed pipe. Considerable heat is absorbed by the feed pipe fromthe material passing through it. In such cases the air line, preferablycopper tubing 3), is tightly coiled around the feed pipe whereby the airin the tubing is heated before it reaches the air cock 302, providingdry air to the recess.

It will be understood that various modifications of the .several partsmay be made within the scope of the appended claims without departingfrom the invention.

Any device having the' purpose of causing the weighed charge todischargejrom the scale ,when operated-as lever 2, described herein-isto be construed as a charge trip device in the appended claims.

.What I claim is:

1. In a filling machine having a known scale with a charge trip devicethat is adapted to cause the discharge of the weighed material therefromwhen saiddevice is operated, the combination ofmeans for filling a valvebag with the said discharged material, including an ejector having adischarge orifice through which the ,material passes before entering thebag, a valve for closing said orifice in the interval 01' dischargingthe filled bag, means for operating the valve, means for controlling theopening of the valve, and means for automatically operating the chargetrip devi when the valve is opened. 7

2. Abagfillingmachine avertically disposed feed p p an elector adaptedto receive the material as it gravitates through saidpipe and todischarge it through'a bag filling'spout.acarriagehavingabagsupportforsupportingthebagintheintervaloffillingandfortrm porting it when filled to apredetermined bag 1 discharging place, and means adapted to beautomatically actuated when the ejector has discharged a predeterminedamount of material for moving the carriage to said place.

3. In a filling machine of the class described. the combination of meanshaving a spout for filling a valve bag that is placed on the spout atthe valve opening, a bag support, automatically actuated means formoving the bag support in a substantially horizontal plane from theplace occupied in filling the bag, and means for removing the bag oifthe spout.

4. In a machine for filling valve bags, the combination of a fillingspout for directing filling material discharging through it into a valvebag suspendedly placed thereon, a carriage for supporting the bag in theinterval of filling and for transporting it when filled, automaticallyactuated means for moving the carriage from filling position and meansfor removing the bag oil. the spout.

5. In a filling machine having a known scale provided with a charge tripdevice and adapted to cause the weighed material to gravitate therefromwhen said device is operated, the combination of means for filling avalve bag with the discharged material, and means controlled by saidmaterial for operating said device when the bag is filled.

6. In a filling machine the combination of a horizontally disposedfilling spout for directing filling material discharging through it intoa receptacle, a support for said receptacle, a carriage carrying saidsupport for transporting the filled receptacle away from fillingposition, means for automatically operating said carriage, and means forcompacting the filling material in the receptacle during the interval offilling.

7. The combination of a feed pipe, an ejector having an exterior casingprovided with a discharge orifice and an intake opening connectingreglstrably with the outlet of said pipe, for discharging fillingmaterial gravitating from said pipe through the orifice; a valve forclosing said orifice, mechanism for operating said valve, means forpreventing the opening of said valve in the operative cycle of the valveoperating mechanism, and means for rendering inoperative the said means.I

- 8. Means for filling a valve bag, a carriage for conveying the filledbag, a bag support mounted on. the carriage, means adapted to engage thebag support for imparting a succession of movements to it whereby thematerial filling the bag movement of the carriage.

9. The combination of a spout for directing filling material into avalve bag which is suspendedly placed thereon, a movable support forsupporting the bag in the interval of filling. means for moving saidsuppo away from filling position for the purpose oi discharging thefilled bag, means for tilting the support after it is moved apredetermined distance, and means for causing the contents of thedischarged bag to seal .ing the carrier after a bag is filled to shiftthe nextspout in order into register with said orifice,

than.

wil

